this point in the present paper I have inserted in the figures of 

 wings letters denoting the parts referred to in the text. Although 

 I could not, on account of the dark patches, put such letters in 

 fig. 3, but the letters of figs. 10 and 17 will serve also for 

 them. I have also placed letters to the figures of the male 

 genitalia. 



Genus Psylla, Geoffr. 



Head prolonged anteriorly in two processes. Stalk of the 

 cubital vein in the forewing shorter than the stalk of the sub- 

 costal vein. 



Psylla Lidgetti, sp. nov. Pi. i., figs. 1-4. 



Insects not forming any gall or shield. 



Pupa naked, active (Fig. 1). Colour, dorsally, dark brownish- 

 yellow, with a dark-brown patch on the head on each side of a 

 longitudinal light stripe ; thorax with an anterior brown patch 

 ^nd six others in two rows ; abdomen transversely banded with 

 brown. Wing-cases dark-brown, almost black. Ventrally, the 

 general colour is dark-red. Antennae and feet greenish, the ter- 

 minal joints of each dark-brown. Eyes red. The general form 

 •of the insect in this stage is elliptical, the head smoothly rounded 

 in front, the abdomen terminating in a minute projection. 

 Antennae as long as the whole body, rather thick, with eight 

 joints, six of which are ringed and bear numerous hairs, and on 

 the last are two unequal spines. Feet thick and swollen, rather 

 short ; the dimerous tarsus, claws and pad are normal of the 

 genus. The margin of the whole body and head is fringed with 

 numerous short hairs, and a number of these are also scattered 

 overall the dorsum. Length of the pupa about IJ mm. =~^ 

 inch. 



The adult insect (fig. 2) is of a general brown colour with 

 some irregular patches of reddish yellow ; the antennae and feet 

 yellow ; eyes red. Head broader than long, somewhat depressed 

 in front and produced beneath in two short roundly-conical pro- 

 cesses. Eyes semi-globular, sessile, numerously facetted. 

 Antennae moderately long and slender, with ten joints, of which 

 eight are ringed. Feet presenting no special characters. In the 

 forewings the sides are nearl}'- parallel, each side very slightly 

 concave in the middle, the ends broadly rounded. The primary 

 stalk of the veins reaches to about one-fourth of the length of the 

 wing; the stalk of the cubitus* is about one-half the length of 

 the stalk of the sub-costa ; the sub-costa forks close to the margin 



* On account of the dark bands on the wing in fig. 3 the veins cannot be 

 well distinguished by lettering ; but the letters in figs. 10 and 17 will 

 answer also for this. 



